Duplex carburetor



F. R. PERRY. DUPLEX CARBURETOR. APPLICATION FILED JAN. 7. 1918.

Patented Aug. 15, 1922.

3 SHEETS-SHEET l.

JM Fm l F. R. PERRY.

' DUPLEX CARBURETOR. APPLICATION FILED JAN. 7. 191e.

F. R. PERRY.

DUPLEX CARBUHE'TOR. APPLlcATIoN FILED 1AN.7.1918.

Patented Aug. 15; 19232.

s SHEETS-'SHEET 3.

FRANK B.. rnnmr, or sistencia-memoirs, ASSIGNOR, BT MESNE ASSIGNMENTS, 0F

ONE-HALF T0 BENJAMIN MOTOR PRODUCTS C0., 0F

PORATION 0F DELAWARE.

DUPLEX cnnuanmn.

apnea/tion sied January 7, 191s. 'serial No. 210,691. y

To al? whomy it may cmwem:

Be it known that I, FRANK R. PERRY, af

citizen of the 'United States, residing at i plicable for the co-mixing of one orV more hydro-carbons and air, either singly or independently as may be desired, or a combined mixing of a plurality ofhydro-carbons and air at the same time. The inven-` tion has among its objects a production of vthe kind described that is simple, eilicient,

compact, durable, and satisfactory for use wherever found applicable. It has particularly as an object the production of a carbureter for carbureting or vaporizing and mixing with ar`the heavier hydro-carbons such as kerosene, distillate, and the like, as well as the lighter hydro-carbons such as gasoline. With my improved device the engine may run on the heavier hydro-carbon alone or on the lighter hydro-carbon alone, or both`may. be employed at the same time. Another object is thg production .of a device that will cause a more conplete breaking up of the hydro-carbon so that there will be no unvaporized particles which may escape past the piston rings into the crank case. Among its further objects is the production of a de vice that may be so regulated and controlled that the engine will not run hot o r over heat even in the warmest or hottest weather and yet it will operate efficiently in the'coldest weather. Many other .objects and advantages of the-.construction herein shown and described willbe obvious to those skilled in the art from the' disclosure herein made.

To this end my invention consistsin the novel construct-ion, arrangement andjcomw bin'ation of parts herein shown and described and more particularly pointed out in .the

In the drawings, wherein -likey reference' characters indicate like or corresponding parts,

Figure l is a View in elevation of my improved carburetor applied to a well-known nn'rnorr, MIgHIeAN, a coatype of engine, the engine being shown in dottedlines forming no part of the present lnventlon, however;

Figure 2-is a sectional view taken on line I of Figure 3; Figure 3 is a vertical sectional view through my preferred form of carburetor; y F1 re 4 1s a sectional view taken substantlally on line 4--4 of Figure 3;

Figure 5 is a detail view in section illustrating a changed position of the valve 50;

F1 ure 6 is a sec/tional View taken substantially on line 6-6 of Figure 7 illustrat- 1n the heat control Valve; and' igure 7 is a sectional view taken substantlally on line 7-7 of Figure.

It may be mentioned that in the installat1on of the device it is immaterial on which side of the engine the carburetor is placed lshown installed on a Ford type -engine in which l represents the engine,'2 a portion of the intake manifold and 3 a portion ofthe 'exhaust manifold. The device illustrated 1s intended particularlyt'or the-carbureting ot' kerosene, distillate or the like, as well as gasoline or its equivalent, so that the engine may be started on gasoline 'or the like and then continue to runon gasoline orkerosene, or both. I

Referring particularlyto Figures 1^, 3 and 4, a suitable casing or tubular pipe 4 is connected by meansof an lelbow 5 or its equivalent with the intakemanifold 2. The opposite end O fftheasing is provided with an air inta-ke 6 at which may be arranged a valve 7. )The valve 7 is shown arranged on a, guiding stem 8, and provided with a control springt). The Valve 'may be adjusted `byturningfthe head 11 to screw the same in or outa'nd is normally locked in ,the desired position by vthe locking member 10'as illus- .tra-ted in'. Fig. 3 of the4 drawings. I also preferably provide a choke kvalve 14 in the casingv 4 which is shown mounted von a shaft l5 extended to the'- exterior of the casing.

At the outlet 16 li provide a butterfly valve 17 which may be mounted on the shaft 18 4 and which is also controlled from lthe exterior of the casing. A Venturi collar or tube- 19, however, is arranged as shown, the purpose of this being explained more fully hereafter. As shown in Figure 1, l provide an arm 20 on shaft 15 by means of which the is connected to an elbow 31 or its equivalent' valve`14 may be controlled. For convenience a rod 21 is provided for operating the arm '20, the rod extending to a convenient point,

as for example,'when the device is on an automobile, to the dash or steering wheel or some point convenient to the driver. rlhe arm 22 is also connected by suitable means as, for example, a rod (not shown) to a point convenient for operation as, for example,l the throttle lever on the. steering wheel or tothe accelerator,'or both.

Arranged adjacent the casing 4 is a heater casing or shell 24 provided with an inlet 25 and outlet 26, this 'casing being arranged for the passage of a. heating medium as, for example, the exhaust gases from the engine through the same. l have shown the casing 24 connected by a suitable piping 27--28 with the exhaust manifold 3, the saine, however, being preferably constructed as at 29 or in an equivalent manner to rovide a valve chamber or casing. The piping 27-28 is connected with the pipe 30 which opens into the pipe parts 32 and 33. The part32 so that it is in communicationA with the outlet-26 of the casing 24 and the pipe 33 is connected with the muffler or Ato the open, the piping constituting a loop of which the heater is a part, the heating medium beingv conducted through the loop as desired:`

Arranged in the valve casing 29 is a valve '34, the same being mounted on astem 35 or v its equivalent, which is shown provided with an arm36 arranged to be actuated by a rod 37 or its equivalent preferably extending to the-dash or some convenient point for the operator to manipulate 'the same. When the valve is in vthe position shown in Figures 3 and 6 the exhaust gases obviously will pass through the part 27, casing 24 and out through the elbow 31 and part 32 into the exhaust pipe 33.. When the valve, however,

' leave both the opening through pipe 30 and through lpipe 27 open', the amount of heat passing t rough the loopl will be diminished, and yet some heat will pass through the' osition l-indicated by thel T e heater and Maase@ loop. -By manipulating the valve as desired or found necessary, the amount of heat may be controlled at all times for cold or warm weather, or diHerent hydro-carbons.

Arranged in the heater casing 24 is a panshaped fuel container or receptacle 39, the same serving as a closure for the casing part 24, Fart 39 is provided with a closure 40. Arranged within the container 39 is a series ofbaiiies 41 of the desired size and shape. These are preferably so arranged, however, that the hydro-carbon passing through the container may come in contact with the bottom of the .container and be thoroughly mixed and vaporized `and partially carbureted. 1f desired balls 53 of suitable material or their equivalents vmay be used as additional baffles. The container is provided with an inlet at 43 to which extends a feed pipe. 42, the same being preferably disposed at one end of the container. The saine is also provided with an outlet 44,

preferably at the opposite end, communiveating with the pipe I45 extending as at 47 to the interior of the casing 4. As shown, it extends into or adjacent the Venturi tube or collar 19. The pipe 45 is shown secured to the part 39 and secured to the part 4 by means of the'threaded members 46, it being understood that any' equivalent construction may be employed. The part 39 may also be provided with an inlet 48 to which extends a feed pipe 49, the inlet 48 in thevvpreferred construction being adjacent the outlet 44, as most clearly shown in Figure 3. v f

Arranged at the outlet or discharge port 44 is a valve 50 which may be providedwith an operating arm 51 and control rod 452 ex. tending to a convenient point, as for example, the driverls seat, vor to the dashv or steering wheel. L

l plrefer to employ a three-way valve 50 whic may be constructed asshown or in an equivalent manner, so that the same may be turned substantially as shown in Figure 3 `or Figure 5 -or turned to a position where the outlet 44 is connected as shown in Figi ure 3, and at the same time pipe 49 is open to pipe 44. This is possible by turning valve 5() to the reverse position to that shown in Fi re 5. will bevnoted'that the relativev size of the two inlets `to the valve may be varied by varying the adjustment of the valve.

lt will be noted by referring to Figure 3 that the pipes 42 and 49' extend some distance below the casin 24 and carry a plate or member which isfspaced from thiefcas-A ing 24 by the spacing /members 56. The plate 55 forms a top or-cover for the two shells or.l casings 57 .and 58, which `provide However, in this connection it. j

Hoat chambers, the shells being' secured lin' place bythe nuts 59 and 60 or equivalent means. lln this connection it maybementionedv that the pipes 52 and 59 are open at As most clearly shown 1n the bottom so as to permit the admission of a limited amount of air. The pipe 42 is provided with a branch pipe 61 extending to substantially adjacent the bottom of the chamber in shell 57. The shell 57 is provided with an intake port 62, passage of fluid to the shell being normally controlled by a valve 63 carried by the float 64 which may be hinged at 65. The pipe 49 is provided with a similar-branch pipe 66 in shell 58 and an intake port 67 is arranged as shown-in the plate 55, 68 being the valve and 69 its ioat hinged at 70. Figure 1, port 62 is connected with the feed pipe v71 and port 67 with the feed pipe 72, these pipes being connected in turn to suitable tanks or receptacles containing'the hydro-carbons. I prefer to connect feed pipe 71 to a tank containing the kerosene, distillate or heavy hydro-carbon and `pipe 72 to a tank or receptacle containing a lighter hydro-carbon such as gasoline or the like. I have not considered it necessary to illustrate the tanks, as they may be of any approved construction, but it may be mentioned ordinarily the first' mentioned tank is of greater capacity than the last mentioned, as the heavier hydro-carbon ordinarily used for the-greater part of the running of the engine and the lighter hydro-carbon in starting, warming up, or at such other times 4as ma be desired.

he operation 'of the carburetor may be briefly described as follows: Assuming that the same is'comie'cted up as shown in Figure 1, or in an equivalent manner, and that the en ine is not running and cold. In this case va ve is turned asshown in Figure 5 and the engine started either by self-starter or by crank or the like. The lighter hydrocarbon from the iioat chamber in Shell 58 is free to enter pipe 47 and as the engine turns over ity draws air and hydro-carbon through pipe 49, the gasoline in shell 58 being drawn up through pipe 66 and with the air passes through or past valve 50, through pipe 47 and mixing with the air in part 4, past the der.

butteriiy valve 17 and throu h the outlet 16 and intermediate piping to t e engine cylin- If desired the choke Valve 14 may be closed to the desired extent in starting. As soon as the engine starts to fire, assume that the valve 34 is in the position shown in Figure 3 the exhaust gases passthrough the casing 24, out throu h 31-32, to the exhaust pipe 33. The irst ring, however, heats the charge passing throughA pipe 49 as well as in thel container 39. As soon as the containe 39 is suiiiciently warmed up the valve 50 may be turned as shown in Figure 3 or to the position where both pipe 49 and the interior of the 'casing is open to pipe 47. At thistime air is drawn through pipe 42 and the fuel or hydro-carbon such as kerosene in shellA 57 is drawn through pipe 61 through.

pipe 42 into the container 39. It is not only y vaporized to a certain extent as it passes through the pipe 42 in the path of the ingoing exhaust gases but as soonas it reaches the container 39 isy thoroughly and completely heated and vaporized and passes into pipe 47 from which it is discharged into the path of the ingoing air through the part 4 admitted through the inlet 6. At suchtme 75 as the engine becomes sufiiciently heated to return the kerosene or heavier hydro-carbon alone, the valve 50 may be turned as shown in Figure 3 entirely cutting -oii' the gasoline or lighter hydro-carbon. It will be noted 80 that the inlet 6 for the admission of air is close to lthe part 27 and consequently the air is to some extent heated before entering part/4. However, I have found that itis not desirable to heat the air paing through part 4 to any considerable extent, as a more eiiicient mixture is obtained by mixing the cooler air with the vaporized hydro-carbon and at the same time 'the mixture is not as hot when discha ed into the engine, consequently the vov,er eating of the engine is ordinarily entirely prevented. l

If at any time it is desired to reduce the heating of the hydro-carbon valve 34 may be manipulated to regulate the amount of and 4, from which it will be seen that the/ inlet end of the pipes are substantially ad-v jacent the pipe 32. v

Having thus described my invention, itis obvious that various immaterial modifications may be made in thesame withoutvdeparting from the spirit of my invention; hence I do not wish to be understood as limiting myself to the exact lform, construction,

arrangement and combination of parts herey L 1n shown and described or uses mentioned', 115

exce t as set forth in the appended claim.

W at I claim as new and desire to' secure by Letters Patent is:

In a device of the kind describeda supply chamber to contain a heavy fuel, a sup- 120 ply chamber to contain a lighter fuel, means for producing a primary mixture of each of said fuels with a small quantity of air, a

conduit for a heating medium arranged adf jacent said supply chamber, a chamber providing an extended surface mounted in'said conduit, an outlet connection from the sup` ply chamber for the heavy fuel across said conduit to the inlet end of the heating chamber, an outlet connection from the supply Where the exhaust 100 g@ meeeee@ l chamber for the lighter fuel across said. een.1 ln testimony whereof, ll have hereunto 'air to said mixer.

duit to the outlet end of said chamber, an signed my name in the presence of two subvalve at said outlet to control the flow of scribng Witnesses. mixture from the heating chamber or the FRANK R. PERRY. light fuel supply chamber to the nozzle o Witnesses: a mixer, and means for supplying additional ROY W. HILL CHARLES ll. COBB. 

